I usually go for Gurren > 623AA > etc, off 4C CH, unless it's too early in the match or I don't have the stars. Otherwise it's just 6C or 4C again. I almost always end the match with like 8 stars, win or lose, so I might as well.
I don't really know of any good Kune matchup vids either... I never really bothered to search them out since, what's the point, I might as well just start pulling out my teeth one by one with a pair of pliers instead if I'm going to play against Arakune. :P
There aren't really any good Arakunes I know of to get experience against anyway, except CopperDabbit and MDK sama and Kousaka (in America). There are probably others out there but I haven't heard of them.